6749 has 4 divisors (see below), whose sum is σ = 7164. Its totient is φ = 6336.

The previous prime is 6737. The next prime is 6761. The reversal of 6749 is 9476.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6737) and next prime (6761).

It can be written as a sum of positive squares in 2 ways, for example, as 4900 + 1849 = 70^2 + 43^2 .

It is a cyclic number.

It is not a de Polignac number, because 6749 - 2⁴ = 6733 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182 + ... + 215.

It is an arithmetic number, because the mean of its divisors is an integer number (1791).

2⁶⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

6749 is a deficient number, since it is larger than the sum of its proper divisors (415).

6749 is a wasteful number, since it uses less digits than its factorization.

6749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414.

The product of its digits is 1512, while the sum is 26.

The square root of 6749 is about 82.1522975942. The cubic root of 6749 is about 18.8978824275.

The spelling of 6749 in words is "six thousand, seven hundred forty-nine".